[英]How to Call contract inside another contarct in solidity version 0.5.2?
I'm using solidity version 0.5.2 我正在使用Solidity版本0.5.2
pragma solidity ^0.5.2;
contract CampaignFactory{
address[] public deployedCampaigns;
function createCampaign(uint minimum) public{
address newCampaign = new Campaign(minimum,msg.sender); //Error
//here!!!
deployedCampaigns.push(newCampaign);
}
function getDeployedCampaigns() public view returns(address[] memory){
return deployedCampaigns;
}
}
I'm getting the error while assigning calling the Campaign contract inside CampaignFactory contract 在分配CampaignFactory合同内的调用Campaign合同时出现错误
TypeError: Type contract Campaign is not implicitly convertible to expected
type address.
address newCampaign = new Campaign(minimum,msg.sender);
I have another contract called Campaign which i want to access inside CampaignFactory. 我还有另一个称为Campaign的合同,我想在CampaignFactory中访问。
contract Campaign{
//some variable declarations and some codes here......
and I have the constructor as below 我有如下的构造函数
constructor (uint minimum,address creator) public{
manager=creator;
minimumContribution=minimum;
}
You can just cast it: 您可以将其转换为:
address newCampaign = address(new Campaign(minimum,msg.sender));
Or better yet, stop using address
and use the more specific type Campaign
: 或者更好的是,停止使用address
并使用更具体的Campaign
类型:
pragma solidity ^0.5.2;
contract CampaignFactory{
Campaign[] public deployedCampaigns;
function createCampaign(uint minimum) public {
Campaign newCampaign = new Campaign(minimum, msg.sender);
deployedCampaigns.push(newCampaign);
}
function getDeployedCampaigns() public view returns(Campaign[] memory) {
return deployedCampaigns;
}
}
To call an existing contract from another contract ,pass the contract address inside cast 要从另一个合同中调用现有合同,请在演员表中传递合同地址
pragma solidity ^0.5.1;
contract D {
uint x;
constructor (uint a) public {
x = a;
}
function getX() public view returns(uint a)
{
return x;
}
}
contract C {
//DAddress : is the exsiting contract instance address after deployment
function getValue(address DAddress) public view returns(uint a){
D d =D(DAddress);
a=d.getX();
}
}
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